What is the pH value of a 1% solution of anhydrous ammonia?

What is the pH value of a 1% solution of anhydrous ammonia?

• A. 9.0
• B. 10.5
• C. 11.6
• D. 14.0

Answer: (C)

Anhydrous ammonia, when dissolved in water, forms a strong basic solution due to its ability to dissociate and produce hydroxide ions (OH-). The pH scale measures the acidity or basicity of a solution, with values below 7 indicating acidity, values above 7 indicating basicity, and a value of 7 considered neutral. A 1% solution of anhydrous ammonia has significant basic properties, contributing to a higher pH value. The correct pH value of approximately 11.6 for a 1% solution reflects this basicity, as it indicates a relatively high concentration of hydroxide ions. This high pH is typical for ammonia solutions because ammonia is a weak base that ionizes in water, and even a dilute solution like 1% can produce a noticeably basic environment. Understanding this concept is crucial for those working with ammonia in industrial refrigeration systems, as such high pH levels can have implications for equipment materials and safety protocols.

Anhydrous ammonia, when dissolved in water, forms a strong basic solution due to its ability to dissociate and produce hydroxide ions (OH-). The pH scale measures the acidity or basicity of a solution, with values below 7 indicating acidity, values above 7 indicating basicity, and a value of 7 considered neutral.

A 1% solution of anhydrous ammonia has significant basic properties, contributing to a higher pH value. The correct pH value of approximately 11.6 for a 1% solution reflects this basicity, as it indicates a relatively high concentration of hydroxide ions. This high pH is typical for ammonia solutions because ammonia is a weak base that ionizes in water, and even a dilute solution like 1% can produce a noticeably basic environment.

Understanding this concept is crucial for those working with ammonia in industrial refrigeration systems, as such high pH levels can have implications for equipment materials and safety protocols.